Filming Sharks in Bimini – A Cautionary Tale

Yesterday we watched the antics of a film crew in Bimini harbor swimming around at a boat dock across from us with baited Bull Sharks in an attempt to place a “fin cam” on the back of an animal. Sadly, as they discovered, the shark site they chose …

New Shark Blog in Town? ‘Bout Bloody Time

Da Shark has discovered a new shark blog and after just two posts we have become fans.Of course that’s also after a few Kalik Beers at one of our favorite Out Island Bahamas watering holes that happens to have crackin’ Internet.And why, you might well …

Southern Stingrays Gateway Shark Diving and Conservation?

There’s a new paper from Guy Harvey’s team about Cayman Island’s hugely successful wild animals encounter, “Stingray City” and what rampant and uncontrolled commercialism of species does to feeding and movement patterns.Oh and it’s not good, in fact it…

Shark Sanctuaries: The HEPCA Enforcement Roadmap?

We just found this website and we have to say it’s a great idea and perhaps an actual solution or stop gap measure to the question of shark sanctuaries and enforcement. Welcome to the fine folks from HEPCA who have had enough of sharks being taken from…

Fiji Leading the Shark Pack – Cool Research

Has it been a decade over there in Fiji? 

Looks like it and now we have research driven data as well.

The kind of data that helps an entire industry grow, the kind of data that Fiji and the Team at BAD are so good at initializing and producing – quality work.

If you thought today’s blog post from Fiji and Da Shark was celebratory, you were correct, and congratulations are in order as well for the entire Fiji team who have fearlessly, “done their own thing,” and in doing so laid out a template for sustainable shark diving the world over.

We have long been fans of BAD and Da Shark, and no we’re really not secret investors, we just have an eye out for excellence in the shark diving community and Fiji consistently fires on all cylinders when it comes to commercial shark diving, conservation, and research.

So Kudos to all for this latest paper and another continued decade of adventures to all:

Opportunistic Visitors: Long-Term Behavioural Response of Bull Sharks to Food Provisioning in Fiji
Juerg M. Brunnschweiler, Adam Barnett


Shark-based tourism that uses bait to reliably attract certain species to specific sites so that divers can view them is a growing industry globally, but remains a controversial issue. 

We evaluate multi-year (2004–2011) underwater visual (n = 48 individuals) and acoustic tracking data (n = 82 transmitters; array of up to 16 receivers) of bull sharks Carcharhinus leucas from a long-term shark feeding site at the Shark Reef Marine Reserve and reefs along the Beqa Channel on the southern coast of Viti Levu, Fiji.

Individual C. leucas showed varying degrees of site fidelity. 

Determined from acoustic tagging, the majority of C. leucas had site fidelity indexes greater than 0.5 for the marine reserve (including the feeding site) and neighbouring reefs. However, during the time of the day (09:00–12:00) when feeding takes place, sharks mainly had site fidelity indexes smaller than 0.5 for the feeding site, regardless of feeding or non-feeding days. 

Site fidelity indexes determined by direct diver observation of sharks at the feeding site were lower compared to such values determined by acoustic tagging.

The overall pattern for C. leucas is that, if present in the area, they are attracted to the feeding site regardless of whether feeding or non-feeding days, but they remain for longer periods of time (consecutive hours) on feeding days. The overall diel patterns in movement are for C. leucas to use the area around the feeding site in the morning before spreading out over Shark Reef throughout the day and dispersing over the entire array at night. Both focal observation and acoustic monitoring show that C. leucas intermittently leave the area for a few consecutive days throughout the year, and for longer time periods (weeks to months) at the end of the calendar year before returning to the feeding site.

About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at

Get to know “Chugey” a Great White Shark at Guadalupe

Chugey is one of the iconic sharks at Guadalupe. We first encountered him in 2004 and he’s been regularly sighted ever since. One of his characteristics is his cut caudal (tail) fin. It pretty much resembles the tail of an airplane, with a flat top.

Chugey is a very active shark, to say the least. Being cautious doesn’t seem to factor into his actions. He’s had numerous injuries throughout the years, but seems to be just fine despite of it.

Just how rough a life does he have? We have talked about the amazing healing power of these amazing Great White Sharks here and it looks like they really need that ability to heal. Chugey, the shark we were talking about in that blog, was back at Guadalupe Island and it looks like that he hasn’t gotten any more careful since he got his face bit the first time. While his original wound closed quite nicely, he was sporting some brand new bite marks.

As a reminder, here is what he looked like 2 years earlier.

Here is what he looked like with his old scar and new bite marks.

This is another picture of Chugey, taken by one of our divers, Marie Tartar.

It’s great to see him back at Guadalupe acting like nothing happened. I continue to be blown away by both their ability to heal and never showing any signs of discomfort or indication that they are in pain, when swimming around with severe bite injuries.

This fall we are heading back to Guadalupe Island for our 19th season of diving with our Great White Sharks. Nicole Nasby-Lucas, who is the person responsible for our photo ID database, will be coming out with us on 4 of our expeditions.  Thanks to her database, we can individually identify the sharks and also have a history of when they visited Guadalupe Island. In 2018 we added over 30 new sharks and are now over 300 individuals that have been sighted, since we first started diving there in 2001.

How many new sharks will we encounter this season? I can’t wait to get back there and find out.

What will he be named?

If you would like to come out with us, we only have a few spaces open for this season. We are also booking for the next 2 season and some expeditions are almost sold out. Don’t miss your chance for an amazing trip of a lifetime. Call 619.887.4275 or email us at for more information or to reserve your space.

Martin Graf
Shark Diver

About Shark Diver. As a global leader in commercial shark diving and conservation initiatives Shark Diver has spent the past decade engaged for sharks around the world. Our blog highlights all aspects of both of these dynamic and shifting worlds. You can reach us directly at